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Plastic parts break quite often, so we decided to find out what is better to spend on - a new product or glue. To test the effectiveness of cyanoacrylate adhesives, we used one of the most common plastics in cars - acrylonitrile butadiene styrene, or simply ABS. We cut the plates for butt and overlap gluing. Since plastic parts have both smooth and rough surfaces, we decided to evaluate the capabilities of the competitors using different combinations.

Of the tested compositions, two are two-component. Looking ahead, we note: if you use them without flux, then the bonding strength becomes nonexistent. Out of interest, they brought in help baking soda- What if it’s better with her? The flux preparations liked the soda, and the rest, let’s say, did not worsen their performance. At the same time, there is a clear advantage from soda: for example, the ability to fill voids in places where there are no plastic particles. For example, it is not always possible to collect all the fragments of a broken bumper, and cheap soda will be just right in this case. By adding baking soda and moistening it with glue, we restore the lost pieces. Once dry, all that remains is sanding, priming and painting.

For those who decide to glue something together, we’ll tell you a secret that all the adhesives we’ve tested are not friendly to moving parts and don’t like bending loads. They also prefer room temperature: As a rule, when heated, glued parts fall apart. Our comments are in the photo gallery, samples are arranged in alphabetical order.

And lastly: try to save plastic! You can glue it together, but a whole piece is still better

3M Scotch-Weld, England

Price 520 rub.

PLUS: Convenient packaging, large volume. Easy to use. Glossy surfaces are glued tightly, rough surfaces are torn from with great difficulty. There are instructions in Russian.

MINUS: With the cap open, the dispenser dries out quickly.

ABRO Super Glue, USA

Price 35 rub.

PLUS: Couldn't find any positives.

MINUS: Couldn't test the glue! Having unscrewed the cap, we discovered a dried mass. (The date of opening the package is April 2014, the shelf life of the glue is until 2015.) Incomprehensible instructions in Russian.

Cosmofen CA 12, USA

Price 200 rub.

PLUS: Convenient bottle, large volume (20 g), instructions in Russian.

MINUS: Strength indicators are at an average level. The parts glued end to end were broken apart with one finger. Overlapping - the same thing. Droplets of drying glue remain on the cap that closes the dispenser after use.

DoneDeal, USA

Price 140 rub.

PLUS: There is a brush in the cap, which can be used to evenly apply glue to both flat and curved hard-to-reach surfaces. Coped well with smooth areas, the breaking force is average. There are instructions in Russian.

MINUS: Small volume: only 5 g. The plates, glued end-to-end, fell apart under light pressure. Poor tear performance on both smooth and rough surfaces.

Hosch, Germany

Price 1250 rub.*

PLUS: Very effective in all types of gluing, both on smooth and rough surfaces.

MINUS: With the same tube size (25 ml) as RapidFix and a similar price, the manufacturer saved money: there is less glue. Ineffective without the addition of flux powder. Difficult to use two-component adhesive on vertical planes: the flux simply crumbles. High price.

*Two-component.

Liqui Moly, Germany

Price 275 rub.

PLUS: Good performance overlapping on rough surfaces. Convenient dispenser. Dries quickly. Instructions in Russian, in which precautionary measures are highlighted in red.

MINUS: The butt-glued plates broke along the seam with slight force. Mediocre performance in other measurements. Container volume 10 g.

Loctite 406

Price 395 rub.

PLUS: Large volume - 20 g. Easy to apply, spreads well over the surface. Strongly glued the surfaces end to end, high breaking force. Very good performance when tearing off overlapping samples, both with glossy and rough surfaces.

MINUS: The instructions in Russian are sloppy, and also faded.

Permatex Super Glue, USA

Price 430 rub.

PLUS: The largest volume in this test is 28 g. Convenient dispenser spout. Spreads well.

MINUS: Low breaking force when gluing butt joints, average performance when gluing with an overlap for any surfaces

RapidFix, USA

Price 1200 rub.*

PLUS: Large volume: 25 ml. Good strength properties using flux in all types of dough. Instructions in Russian.

MINUS: Inconvenient to glue vertical surfaces. Ineffective without flux powder; in the one-component version, the adhesive properties are at the level of the weakest samples. High price.

*Two-component.

Wurth Klebfix, EU

Price 457 rub.

PLUS: There are instructions in Russian.

MINUS: Samples glued end to end broke under light pressure. Overlapping - the situation is no better, regardless of the type of surface. Small bottle volume: only 5 g. Dried glue accumulates in the tube spout, blocking the dispenser cross-section.

Metal is a strong and durable substance that is not easily joined together. Several decades ago, gluing the surfaces of this material was quite difficult. Nowadays, many companies produce metal adhesives with excellent cohesive resistance. What should the adhesive base be and how to glue it steel products Right?

How to choose a good glue

Today, many types of adhesives are produced for bonding metals. The best among them are metal glue with high level viscosity When choosing a binding mass, its safety for human health is of considerable importance - some products release toxic substances when hardening.

A good adhesive base for joining steel products must meet all technical quality principles:

• maximum strength and reliability;
• longevity;
• resistance to maximum temperature changes;
• water resistance;
• no expansion or shrinkage during curing;
• anti-corrosion protection.

To reliably glue metal when choosing, you must take into account the proper physical and mechanical properties and geometric shapes of the combined surface. The binding base should reduce the difference between elasticity and coefficient of thermal expansion.

To find out more, watch the video:

The best option when choosing an adhesive is a viscous substance that can connect metal materials not only to each other, but also to various non-metallic surfaces.

Types of glue for metal products

Often, when joining two materials at home, the question arises of how to glue metal to metal firmly and for a long time. There are many adhesives on sale produced by various companies. They can consist of two or one component, as well as additional impurities and are applied to the entire area of ​​​​the parts to be glued or pointwise.

The most effective and popular adhesives are:

• epoxy adhesive. It consists of resins, substances to accelerate curing and fillers. Epoxy adhesive mixtures can be liquid or paste-like. They basically include two components that are mixed before use. This glue is heat-resistant and water-resistant, and also has good wear resistance;
• universal super glue for metal - “Moment Super Epoxy Metal”. It is designed for combined gluing of all types metal surface. The adhesive contains epoxy resins and hardeners. It is used to glue steel products to different surfaces. Superglue is frost-resistant and resistant to solvents and oily substances. It is easy for them to apply smooth seams that do not spread or decrease in size when cured;
• Double-sided tape. The material is excellent for combining metal with metal, as well as with other bases. Adhesive tape selected depending on the area connecting parts and weight of the structure. Gluing metals with such viscous tape ensures stable adhesion of the two bases, which is practically not afraid of the influence of various external factors;
• cold welding. This option for joining metal parts is carried out by deforming the welding mass and completely introducing it into the surface of the product. This adhesive may consist of one or two elements and is an excellent remedy for strong adhesion of steel materials. Cold welding is an adhesive that retains its characteristics at very high temperatures.

To glue a metal or other surface, silicone glue sticks are sometimes used, which are applied to the material using a special gun when heated.

How to properly connect metal surfaces

How to glue metal parts? Having selected a suitable glue, you can glue steel objects with your own hands without professional skills and additional equipment. To glue metal to metal, follow these steps:

Watch the video for more details:

• thoroughly clean the surface from rust and degrease it using a solvent or other grease-removing product;
• when using two-component glue, you need to mix the hardener with the base;
• Apply glue evenly to areas intended for gluing;
• connect the parts and press them tightly together;
• maintain the time specified in the instructions for the final setting of the adhesive mass;
• If necessary, sand hardened seams with a file or sandpaper.

Apply glue only to a clean and dry surface.

Having selected a good adhesive mass and figured out how to glue metals, you can efficiently carry out the process of joining steel parts yourself.

It would seem that solving the problem of restoring a broken plastic item is simple - to do this, you need to connect its broken parts and glue them together. But the use of glue does not always give the expected result. And all due to the fact that all adhesives for plastics are different. To answer the question of how to tightly glue plastic, you should study the features and properties of the most popular compositions and choose the best among them.

Types of glue for plastic

Gluing materials made from synthetic polymers is sometimes more difficult than ceramics and metal. The structure of the plastic is different smooth surface and, accordingly, low adhesion. IN industrial production Welding is used to connect plastic parts. Gluing plastic at home in this way is impossible, so repairs are carried out using glue.

The main component present in most adhesives is a special mixture that dissolves synthetic polymers. To impart viscous properties to the compositions, liquid polystyrene is added to them.

The principle of operation of such compositions is to dissolve parts different surfaces. After compressing them under pressure, a strong adhesion of the glued parts to each other occurs.

Depending on the composition, all adhesives are divided into the following types:

1. hot glue;
2. contact;
3. liquid;
4. reactionary.

To figure out which glue is best for gluing plastic, you need to study the properties and features of each type of glue.

Hot melt adhesive

Such connecting compounds are solid rods. To impart adhesive properties, they must be heated to a certain temperature. For this purpose, special pistols are used.

As a rule, hot-melt adhesives are used in creative work because they have low bonding strength and are poorly suited for precision work.

In stores you can also find hot melt adhesives that are designed for use without a gun. Their advantage is ease of use and fairly rapid hardening.

Contact

Those who are thinking about how to glue plastic at home simply and quickly should pay attention to contact adhesives. Some of them come with a special hardener included. Before starting work, you need to mix the two compositions according to the instructions on the package.

Such compositions are capable of rigidly connecting plastic parts, however, they are highly toxic. You need to use contact adhesive for plastic strictly following the instructions.

Before connecting two parts that have contact adhesive applied, you should wait at least 10 minutes for it to dry, and only then press the two parts tightly together.

Liquid

Liquid substances are simple and accessible, but at the same time they have the lowest quality of joining plastic parts. They can be made on water based, or contain a solvent.

It is recommended to use them for working with small objects that will not be subject to further stress. Liquid adhesives are not prone to destroying the structure of the plastic. This is very important when working with small parts, since the glue that dissolves the plastic can deform them. They harden for quite a long time, so after repair work It is necessary to leave the glued parts for at least a day.

Reactionary

Such household compositions are considered the most reliable, and at the same time they are among the most affordable. It should be noted that many of them have their own application features.

So, when working with some of them, the parts to be connected must be left to dry for outdoors. Other formulations require exposure to ultraviolet rays, while others only work underwater.

Reaction adhesives can be:

• Single-component.
• Two-component.

Both one-component and two-component plastic adhesives can contain components such as polyurethane, epoxy resins, and polyesters.

The best waterproof adhesives

Waterproof compounds are used to join parts that are exposed to moisture. For example, such adhesives are used to connect PVC pipes and others plastic materials in the bathroom or kitchen.

The best glue for plastic, according to many, is Moment Plastic. It is a contact type and perfectly connects almost all types of plastic. Due to the presence in its composition harmful substances They are not recommended to glue objects in contact with food or human skin.

Moment Plastic dries very quickly, it is molded with high strength even under the influence of moisture, temperature fluctuations, alkalis, and acids.

This epoxy plastic adhesive has super-fast adhesion - it hardens within 20 minutes after application. The composition is simple and easy to use; it is good for sealing cracks and holding together broken parts. It is suitable for all main types of plastic.

Loctite 406 is a waterproof plastic adhesive that is quite easy to apply. When applied, it is well distributed over the surface. Loctite 406 has high strength characteristics when gluing both glossy and rough surfaces.

The best heat-resistant adhesives

When the question arises, what can be used to glue plastic to plastic in places where high temperatures, you should pay attention to heat-resistant compounds. Such substances are able to withstand high temperatures for a long time without losing their original strength.

Rexant is a transparent adhesive for plastic, available in sticks designed for pistols. This manufacturer also produces rods in green, blue and other colors, which are used to visually mask joints when gluing colored parts.

This heat- and moisture-resistant adhesive sealant contains silicone that hardens when exposed to moist air. The adhesive is highly heat resistant and can withstand temperatures up to 300°C.

When using hot melt adhesive to join plastic, you must remember that the plastic materials themselves are not able to withstand high temperatures.

Elite Drakon is a polymer adhesive for plastic, parquet, ceramics, wood and other materials. Using this product, you can glue materials of different compositions without worrying about the quality of the gluing. Dragon has high adhesion and heat resistance.

At making the right choice Using glue and its optimal use, you can successfully glue any plastic part together. Following the recommendations specified in the instructions will allow you to restore a broken item without unnecessary material costs.

Breakage of any item is always unpleasant. As a rule, this happens at the most inopportune moment. Restoring integrity and shape is not easy. This will require time and effort. Great option The solution to the problem is to use glue. This is a universal tool that will cope with many tasks.

On modern market proposed big choice similar goods. They differ in many of their characteristics, quality indicators and purpose. Therefore, before using it, you will need to determine the material from which the item is made. If you choose the right glue, then the item can not only be easily and simply restored, but also count on its long service life. After all, the connection will be strong and reliable.

Which one is the strongest?

Many people are interested in what is the strongest glue. There are many manufacturers who offer similar products. As practice shows, it is better to give preference to well-known brands. They have proven themselves to be quality materials, who do an excellent job with the task.

Accordingly, the cost of such a product is higher. But in this case there is no need to save money. Since low-quality glue will not provide a strong and strong connection of its parts. Quite quickly the gluing problem will arise again.

How to choose?

There are a number of factors that are important to consider when choosing an adhesive. The first thing you should pay attention to is the composition of the product. If we are talking about a plastic object, then the glue must contain polystyrene. It will provide a strong and strong connection. In addition, it is necessary to have solvents that help dissolve the layers of plastic located on top. The most effective type of glue for this case will be the contact type of glue. It consists of acetone, chlorinated solvent and ethers.

Kinds

The glue is available in a wide range. The most popular among consumers are its four types. The first one was called hot melt glue. It includes several options for such tools. Home them distinguishing feature is that they can only be used under certain conditions. Especially it concerns temperature regime. After heating, the glue can perform its main task - gluing. Its application requires the use additional tools. Basically, it is a special pistol. It is able to heat the glue to 100-200 degrees.

Another type of glue is liquid. Its main feature is the base, which uses water or a solvent. The principle of its operation is that moisture evaporates from the product after application to the required surface. Thus, it glues the necessary parts together.

There are some restrictions on the use of this glue. It is well suited for gluing porous surfaces. When working with sealed ones, it may not cope with the task, since it will not have the opportunity to dry well. An example of such glue is PVA. Although it is mainly used for paper and fabric, it is also suitable for plastics.

Reaction glue is no less popular. It differs in its composition. May consist of one or two components. The first type is characterized by the presence of a hardener in the composition. It provides the liquid consistency of the glue. The main thing is that it is stored in a closed container. Once it is exposed to air, it begins to activate its bonding abilities. Under such conditions it quickly turns into a solid state. An example of such glue is “Secunda”, “Superglue”. They are shown in the photo below.

Adhesives, which include a hardener and a binder, are two-component. Basically these components are located separately. Therefore, before use, you will need to mix them thoroughly. Moreover, such glue has a limited period of use. Basically, it is thirty minutes, since after this time the glue will simply harden and become unusable.

If we are talking about a plastic object, then contact adhesive is considered the best for it. Moreover, it comes in two types: with and without hardener. The gluing principle is based on the fact that it is necessary to apply the product to the surface and then leave it for some time. 7-10 minutes will be enough. The final procedure is to connect the parts and compress them tightly.

The main disadvantage of such funds is high rate their toxicity. Therefore, when working with them you need to be as careful as possible. The room must be opened for ventilation. Moreover, you should not close it for half an hour after the work is completed.

How to glue wood?

When working with wooden surface the most the best glue so-called liquid nails are considered. This glue will an indispensable assistant in solving this problem. Therefore, it is often used in everyday life. It allows you to firmly and firmly fasten objects. Often such a connection is called dead, since it is almost impossible to disconnect it. It is able to harden quickly. Withstands various loads.

An example of such glue is Keraflex. It is well suited for fixing a mirror on the wall or other object. Moreover, it is suitable for gluing metal objects. For example, coat hooks. As practice shows, it can also be used for ordinary wooden shelves that need to be mounted on the wall.

Buying any glue today is not a problem. Just go to hardware store. There is a large selection of them. Moreover, you can use the consultant’s recommendations. It is enough to tell him about the purposes for which glue is needed. Based on this data, he will select the required composition. Thus, you can glue a part from any material. The connection will be strong and durable.

Glue "Loctite"

The new record has been added to the Guinness Book of Records. The jury determined the most durable glue. This is Loctite. The test was carried out as follows: two cars, total weight which amounted to over 5 tons, were glued with just nine drops of glue to a steel beam and lifted by crane to a great height. Loctite withstood this load. It is produced by an Irish plant owned by the international chemical concern Henkel.

Universal glue

More than fifty countries in the world purchase this glue. We receive this glue, but under the name “Super Moment,” from Henkel Bautechnik (Ukraine), a company that packages glue supplied from Ireland. It glues wood, metal, glass, ceramics, rubber, plastics, etc. equally well, both homogeneous materials and those with different properties (for example, metal - glass).

Bacterial glue

But this is not the limit. The bacteria Caulobacter crescentus produce an adhesive substance that is approximately 2.5-3 times stronger than Super Moment. It was discovered and studied by scientists from Brown University and Indiana University. The habitat for bacteria is fast-flowing water (water pipes, fast-moving rivers and streams). That is, in addition to strength, the glue has another invaluable quality - it does not interfere with wet surfaces. Professor Yves Bran, a participant in the research, names two problems: first, it is difficult to establish production on an industrial scale; second - it’s not clear how to make the glue separate from production equipment(it cannot yet be torn off or washed off from the glass surface).

“Bacterial glue” would be useful not only in technology and in everyday life. The glue is absolutely non-toxic, so it would be excellent application in medicine, there would be no need to make and remove stitches. It would not be necessary to remove it; it gradually dissolves on its own, like catgut (threads from bovine veins). The production of this glue is promising, but for now it is a matter of the future, since the identified problems have not been solved.

Alexander Sochivenko, Samogo.Net